A new option for 2015 is D05 (super high roof - unpainted). It is available for 170" Cargo & Crew Vans and 170" E Cargo Vans. This 3rd available roof type adds approximately 5 inches of height to the cargo area vs. high roof.
I do not know if the roof is constructed like the high roof. I wonder why it is unpainted.
A converter like Advanced RV uses any leftover free space on the roof to add solar panels. So I could see a heat resistant white paint on the roof before being covered with solar panels. The extra inside depth could be used for ducted A/C and additional insulation. Airstream trailers just started using ducted A/C and customers love the quietness versus the noisy non-ducted Dometic Penguin II.
I do not know if the roof is constructed like the high roof. I wonder why it is unpainted.
A converter like Advanced RV uses any leftover free space on the roof to add solar panels. So I could see a heat resistant white paint on the roof before being covered with solar panels. The extra inside depth could be used for ducted A/C and additional insulation. Airstream trailers just started using ducted A/C and customers love the quietness versus the noisy non-ducted Dometic Penguin II.